METHOD FOR EXTRACTION OF ESSENTIAL OIL FROM RHODODENDRON ADAMSII SHOOTS Russian patent published in 2023 - IPC A61K36/45 A61K135/00 B01D11/02 

FIELD: essential oil industry; food industry; chemical and pharmaceutical industry.

SUBSTANCE: invention relates to essential oil, food, and chemical and pharmaceutical industries, namely to a method for extraction of essential oil from Rhododendron adamsii shoots. The method for extraction of essential oil from Rhododendron adamsii shoots includes grinding of Rhododendron adamsii shoots, extraction of ground raw materials with an organic solvent in “Soxhlet” device, evaporation of the solvent, where, as an organic solvent, light-boiling liquid – fluorinated ketone-5-1-12 Novec 1230 is used, at the ratio of raw materials/solvent of 1:5.6-9.6 wt./wt. Extraction of raw materials is carried out for 1.5-3.5 hours, the resulting extract is evaporated to obtain essential oil of Rhododendron adamsii.

EFFECT: above-described method is a more energy-efficient method for extraction of essential oil from Rhododendron adamsii, provides obtainment of essential oil, which is enriched with sesquiterpenoids (C₁₅H₂₄), such as trans-alpha-farnesene, trans-beta-farnesene, 3,7(11)-selinadiene.

1 cl, 3 dwg, 2 tbl